After taking Armour thyroid for over 20 years for a thyroid nodule, I was changed to Synthroid because my TSH was too low. Now I have extreme fatigue, intolerance to cold, pain in my ear, a full feeling in my throat on the side of the thyroid nodule, a feeling of not getting a full breath, weight gain of over 30 pounds in the 2 years I've been on the synthroid. I used to do one hour of exercise at the gym 3 times a week and now can hardly do 30 minutes. My muscles feel extremely weak like I have been exercising hard. Now I've developed terrible tinnitus in both ears. I also have fibromyalgia so there's the kicker but didn't have to take any pain medicine when I was on thyroid. I'm a RN, if I had a patient with these symptoms I'd try to help her discuss these with her doctor. What do I do? The nodule has been biopsied and is benign. I'm 62 and am still working part-time but have had to limit that due to my symptoms. Any suggestions would be greatly appreciated.